Spindle mounted automatically doffable warp bobbin



Dec. 27, 1966 M. M. BRYAN, JR 3,293,842

SPINDLE MOUNTED AUTOMATICALLY DOFFABLE WARP BOBBIN Filed May 26, 1965INVENTOR Morris Bryan, Jr.

ATTORNEYS United States Patent 3,293,842 SPINDLE MOUNTED AUTOMATICALLYDOFFABLE WARP BOBBIN Morris M. Bryan, lira, Jeiferson, Ga, assignor toThe .leflerson Mills, Inc., Jefferson, 6a., a corporation of GeorgiaFiled May 26, 1965, Ser. No. 459,066 1 Claim. (Cl. 57130) This inventionrelates to bobbins, and is more particularly concerned with a warpbobbin that is doffable by conventional means.

Although some bobbins are constructed so that they are easily doffableand replaceable by very simple mechanisrns, the warp bobbin isconstructed and held in such fashion that conventional, simplemechanisms cannot remove the bobbin from its spindle. The warp bobbin isconventionally carried on a spindle to be wound; and, the spindle isrotated at high speed which requires that the bobbin be firmly seated,and sufficiently tight on the spindle that there would be no eccentricrotation of the bobbin with respect to the spindle. These requirementshave caused past warp bobbins to be placed firmly on a spindle, andseated against a lower flange which makes them very diflicult to removeautomatically.

There have been mechanisms to remove warp bobbins automatically, butthese mechanisms have been extremely complicated and very expensivesince they must firmly grasp a bobbin and pull it vertically until ithas cleared the spindle.

The device of the present invention overcomes the above mentioned andother difliculties by providing means for leaving a space between thespindle flange and the bobbin so that a conventional plow can be used todoff the bobbin; yet, the bobbin is held firmly on the spindle so thatthere can be no eccentric rotation of the bobbin with respect to thespindle. The device of the present invention is extremely simple, andcomprises a simple addition to a conventional warp bobbin so that therewill be very little expense involved in manufacturing the warp bobbin inaccordance with the present invention. It will thus be seen that thedevice of the present invention is very simple and inexpensive, yet veryeflicient and quite durable.

These and other features and advantages of the present invention willbecome apparent from consideration of the following specification whentaken in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded view showing a conventional warp bobbin and theinsert of the present invention, the bobbin and the insert being indiametrical cross-section;

FIG. 2 is a side elevational view showing a conventional spindle havinga warp bobbin made in accordance with the present invention mountedthereon, the bobbin being in diametrical cross-section;

FIG. 3 is a side elevational view of a bobbin made in accordance withthe present invention mounted on a conventional spindle, and showing aplow preparatory to removing the bobbin from the spindle; and,

FIG. 4 is a view similar to FIG. 3, the plow having partially removedthe bobbin from the spindle.

Referring now more particularly to the drawings, and to that embodimenthere chosen by way of illustration, there is a conventional warp bobbinof frusto-conical shape. Although the exact construction of the bobbin10 is not illustrated, such bobbins are conventionally made of animpregnated paper, and are provided with metal ferrules to protect theends of the bobbin. There is here shown a ferrule 11 at the lower,larger end of the bobbin 10, and a ferrule 12 at the upper, smaller endof the bobbin.

The insert 14, which is shown in FIG. 1 as exploded from the bobbin 10,is a hollow frusto-conical member which may be formed of paper, any oneof various plastic materials, or the like. The function of the insert 14is to reduce the interior diameter of a portion of the bobbin 10. Thisis shown more clearly in FIG. 2 which shows the insert 14 within thebobbin 10, and shows the bobbin 10 on a spindle 15.

It will be seen that the spindle 15 has an upper fru'stoconical portion16 of somewhat less length than the bobbin 10; and, immediately belowthe frusto-conical portion 16, there is a flange 18 on which aconventional bobbin rests. A bobbin will contact the upper end of thefrustoconical portion 16 of the spindle 15 in the area designated at 19;and, a bobbin will contact the lower end in the area designated at 20 ofthe frusto-conical portion 16 of the spindle 15.

It will be seen in FIG. 2 that the insert 14 is substantially in thearea 20 of the frusto-conical portion 16 of the spindle 15 so that theinsert 14 effectively reduces the internal diameter of the bobbin 10,and becomes the part of the bobbin that contacts the area 20. Since theportion 16 of the spindle 15 is frusto-conical, and the internal bore 21of the bobbin 10 is frusto-conical, when the internal diameter of thebore 21 is reduced, the bobbin 10 will not go on the spindle 15 as faras it normally would. With conventional bobbins, the lower ferrule 11will rest against the flange 18; but, since the internal diameter of thebobbin 10 is reduced by the insert 14, the bobbin 10 will not restagainst the flange 18, but will stop, leaving a space 22 between thelower ferrule 11 of the bobbin 10 and the flange 18 of the spindle 15.

An understanding of the operation of the device can be had by referringto FIGS. 3 and 4 of the drawings. It will be seen that, with the bobbin10 placed on the spindle 15, the space 22 provides an entrance for aplow 24. It should be understood that plows such as the plow 24 are wellknown in the art, and are simply camming members having a point 25 to beinserted beneath the bobbin 10, and a camming surface 26 up which thebobbin will ride. The camming surface 26 is of suflicient height that,when the bobbin has ridden up the entire height of the camming surface26, the bobbin 10 will be removed from the frusto-conical portion 16 ofthe bobbin 15. In operation, the plow 24 is simply moved horizontallythe point 25 being inserted into the space 22; and, as the plow 24continues to move horizontally, the bobbin is moved vertically to beremoved from the spindle 15.

While the invention has been here illustrated as including the insert14, it will be readily understood that any other means for reducing aportion of the diameter of the bore 21 of the bobbin 10 would meet withequal success. A ring somewhat like an O-ring could be used, the bobbincould be formed with a portion of reduced diameter, or the entire wallof the bobbin 10 may be deformed inwardly to provide the portion ofreduced diameter. The important feature is to provide some means forreducing a portion of the internal diameter of the bobbin 10 so that theinterior of the bobbin 10 will engage the area 20 of the frusto-conicalportion 1 6 of the spindle 15 soon enough to prevent the bobbin 10 fromcompletely engaging the flange 18 in order to provide the space 22between the ferrule 11 and the flange 18. The space 22 should of coursebe only sufiicient to allow entrance of the point 25 of the plow 24.

It will be seen that the particular device here shown is by way ofillustration only, and is meant to be in no way restrictive; therefore,numerous changes and modifications may be made, and the full use ofequivalents resorted to, without departing from the spirit or scope ofthe invention as defined by the appended claim.

I claim:

In a winding apparatus of the type having bobbins mounted on spindlesand wherein said bobbins may be doffed from said spindles by an arcuateplow-type doffer, the improvement therein comprising at least onespindle having an upper frusto-conical portion for receiving a bobbinand a flange at the lower extremity of said portion, a frusto-conicalbobbin mounted on said spindle having a longitudinal central boretherein for receiving'the upper frusto-conica1 portion of the spindle,said bobbin being formed from paper, a metal reinforcing ferrule securedto the base of the bobbin, the upper portion of said central bore ofsaid bobbin being of such a diameter that the inner wall is inengagement with the upper end of the frustoconical portion of saidspindle, the lower portion of said central bore of said bobbin being oflarger diameter than any portion of said spindle above said flange, saidlower portion having a hollow insert positioned near the base of saidbobbin for reducing the inner diameter thereof and thereby maintainingsaid mounted bobbin in such a position on said spindle that said ferruleis spaced above said flange 1a sufficient distance to permit the leadingedge of the arcuate plow-type doifer to pass between the ferrule on thebase of said bobbin and the flange of said spindle.

References Cited by the Examiner UNITED STATES PATENTS 8/1874 Stone2A246.21 X 357,066 2/1887 Colby 24246.2 X 851,774 4/1907 Pope -124246.21 2,236,178 3/ 1941 Kennedy 24246.21 2,615,650 10/1952 Betner eta1. 242-11832 2,961,822 11/1960 Prat 5753 FOREIGN PATENTS 480,189 2/1938Great Britain.

FRANK I. COHEN, Primary Examiner.

GEORGE F. MAUTZ, Examiner.

